Class 9 Science SOUND Mix Example - SOUND

Easy

State whether the following statement is true or false: Sound and light travel in a medium in the form of crests and troughs and rarefactions and compressions respectively.

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Solution

(FALSE) The statement is False.
Sound waves are longitudinal waves that travel in a medium in the form of compressions and rarefactions.
Light waves are electromagnetic waves (transverse waves) that travel in a medium in the form of crests and troughs.

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Mix Example - SOUND

The distance between the crest and trough of a transverse wave is $15 \, cm$. What is the velocity of the wave if its frequency is $1000 \, Hz$?

Easy

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$(a)$ Why does the stage of an auditorium have a curved background,curtains,carpets,and a false ceiling?
$(b)$ The sound of a ringing bell inside a vacuum chamber cannot be heard. Why?

Medium

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Define echo. Establish a mathematical relation between speed of sound, distance of reflecting body from source of sound, and time for echo.

Medium

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Name the subjective property of sound related to its frequency and of light related to its wavelength.

Easy

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$(a)$ $A$ mobile ringing inside a vacuum chamber cannot be heard outside. Why?
$(b)$ Represent a transverse wave graphically.
$(c)$ What is meant by loudness of sound? On what factor does it depend?

Medium

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State whether the following statement is true or false: Sound and light travel in a medium in the form of crests and troughs and rarefactions and compressions respectively.

Similar Questions

The distance between the crest and trough of a transverse wave is $15 \, cm$. What is the velocity of the wave if its frequency is $1000 \, Hz$?

$(a)$ Why does the stage of an auditorium have a curved background,curtains,carpets,and a false ceiling?$(b)$ The sound of a ringing bell inside a vacuum chamber cannot be heard. Why?

Define echo. Establish a mathematical relation between speed of sound, distance of reflecting body from source of sound, and time for echo.

Name the subjective property of sound related to its frequency and of light related to its wavelength.

$(a)$ $A$ mobile ringing inside a vacuum chamber cannot be heard outside. Why?$(b)$ Represent a transverse wave graphically.$(c)$ What is meant by loudness of sound? On what factor does it depend?

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$(a)$ Why does the stage of an auditorium have a curved background,curtains,carpets,and a false ceiling?
$(b)$ The sound of a ringing bell inside a vacuum chamber cannot be heard. Why?

$(a)$ $A$ mobile ringing inside a vacuum chamber cannot be heard outside. Why?
$(b)$ Represent a transverse wave graphically.
$(c)$ What is meant by loudness of sound? On what factor does it depend?